How can i buy an adapter for this?

On amazon, i bought a pair of headphones that were usb-c by mistake. I use iphone and a pc computer, they dont have usb-c plugs. The headphones are usb-c and i am trying to find an adapter that makes usb-c go to a 3.5mm audio jack. I want one where the usb-c side is "open" and the 3.5mm jack side is... show more On amazon, i bought a pair of headphones that were usb-c by mistake. I use iphone and a pc computer, they dont have usb-c plugs. The headphones are usb-c and i am trying to find an adapter that makes usb-c go to a 3.5mm audio jack. I want one where the usb-c side is "open" and the 3.5mm jack side is "closed" (no hole). I don't really know how to explain this, hope somebody understands.

3.5mm plugs for headphones typically do not carry enough power (there is an exception for *some* camcorders' mic jacks that have "plug-in-power", but these are the exception).

USB headphones - whether USB-b or USB-c - can carry power (typically for the little LED showing they are in use and sometimes for the mic and speakers associated with the headphones.

Since the 3.5mm connector has not enough or no power and the USB headphones generally need power, what you want does not exist/is not possible... unless you add in an external power supply and the whole portability design is out the window.

You won't find one. In order to perform the conversion from 3.5mm jack to outputting for USB headphones, you'd need a power supply. It's just not something that anyone expects anyone to do, and so there is no adapter for it!